<template>
  <HomePanel ref="target" title="人气推荐" sub-title="人气爆款 不容错过">
    <Transition name="fade">
      <ul ref="pannel" class="goods-list" v-if="goods.length > 0">
        <li v-for="item in goods" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="">
            <p class="name">{{item.title}}</p>
            <p class="desc">{{item.alt}}</p>
          </RouterLink>
        </li>
      </ul>

      <!-- 骨架屏 -->
      <div class="home-skeleton" v-else>
        <div
          class="item"
          v-for="i in 4"
          :key="i"
          :style="{ backgroundColor: '#fff' }"
        >
          <XtxSkeleton bg="#e4e4e4" width="306px" height="306px" animated />
          <XtxSkeleton bg="#e4e4e4" width="160px" height="24px" animated />
          <XtxSkeleton bg="#e4e4e4" width="120px" height="24px" animated />
        </div>
      </div>
    </Transition>
  </HomePanel>
</template>

<script>
// import { ref } from 'vue'
import HomePanel from './home-panel'
import { findHot } from '@/api/home'
import { useLazyData } from '@/hooks'
export default {
  name: 'HomeNew',
  components: { HomePanel },
  setup () {
    // const goods = ref([])
    // findHot().then(data => {
    //   goods.value = data.result
    // })

    /**
     * const target = ref(null)
    // 参数1 需要监听的元素
    // 参数2 回调函数 isIntersecting 是否在可视区
    // 参数3 停止监听
    const { stop } = useIntersectionObserver(target, ([{ isIntersecting }], observerElement) => {
    // 在此处可根据isIntersecting来判断，然后做业务
      console.log(isIntersecting)
      if (isIntersecting) {
        stop()
        findHot().then(data => {
          goods.value = data.result
        })
      }
    })
     */

    const { target, result: goods } = useLazyData(findHot)

    return {
      goods,
      target
    }
  }
}
</script>

<style scoped lang='less'>
.goods-list {
  display: flex;
  justify-content: space-between;
  height: 426px;
  li {
    width: 306px;
    height: 406px;
    .hoverShadow();
    img {
      width: 306px;
      height: 306px;
    }
    p {
      font-size: 22px;
      padding-top: 12px;
      text-align: center;
    }
    .desc {
      color: #999;
      font-size: 18px;
    }
  }
}

.home-skeleton {
  width: 1240px;
  height: 406px;
  display: flex;
  justify-content: space-between;
  .item {
    width: 306px;
    .xtx-skeleton ~ .xtx-skeleton {
      display: block;
      margin: 16px auto 0;
    }
  }
}
</style>
